Light aggregate cell concrete self-insulating building block and preparation method thereof

Abstract

The invention discloses a light aggregate cell concrete self-insulating building block and a preparation method thereof. The building brick is prepared by dosing, stirring, mixing, foaming, injecting and moulding, maintaining and hardening the following components in percentage by weight: 25-30% of cement, 10-20% of industrial residue admixtures, 20-35% of industrial residue aggregates, 25-30% of water, 1.0-3.5% of a compound additive and 0.1-0.3% of a foamer. The light aggregate cell concrete self-insulating building block prepared by the method disclosed by the invention is high in strength and low in density, wherein the apparent density is 500-1200kg / m<3>, the compressive strength is 3.5-15.0MPa, and the heat conductivity coefficient is 0.08-0.25W / (m.K). The building brick has good fireproof and flame retardant performances as well as heat-preserving and heat-insulating properties, and satisfies the demand of national energy conservation by 65%. Meanwhile, a plenty of industrial residue light aggregates are utilized, so that cement is saved, thereby facilitating energy conservation and emission reduction and maintenance of the ecological environment.

Description

Technical field [0001] The present invention belongs to the field of civil engineering materials, involving a light -grained microporous concrete self -insulation block and its preparation method. [0002] Background technique [0003] Micro -hole concrete (foam concrete, air -citing concrete), because it contains a large number of closed pores, shows good physical mechanical properties and use functions, has the advantages of light quality, durability, good overallness, and fast construction speed.In recent years, it has been widely used in the construction market.However, at present, the micro -hole concrete still has problems such as low strength, excessive water absorption, and excessive shrinkage during the application process.The reason is that micro -holes concrete introduced a large amount of bubbles during production, and the raw materials are mainly powder and fine particles, which shows a high contraction rate in performance. The cracking phenomenon is common.Essence ...

AI Technical Summary

Problems solved by technology

[0004] On the one hand, in the production of microporous concrete, in order to improve its strength, it is often required to use a large amount of cement (generally, the amount of cement accounts for 50% to 100% of the total dry material), high-grade cement, which makes hardening The surface of microporous concrete is prone to cracking, which makes the price higher; on the other hand, in order to meet the workability of its construction requirements, the water consumption of microporous concrete is much larger than that of cement hydration in ordinary concrete. There are many, resulting in a large water storage rate of the microporous concrete insulation layer during use; at the same time, due to the porosity of the microporous concrete, early shrinkage and cracks generated during use, the microporous concrete absorbs a large amount of external water, so the water absorption rate Big

Due to the above-mentioned many shortcomings and deficiencies of microporous concrete, the application is greatly restricted

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